PUSH-OUT TEST ON SHEAR BOND STRENGTH OF CFST
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摘要: 为考察钢管混凝土界面抗剪粘结性能,研究钢管截面形式对钢管混凝土界面抗剪粘结性能的影响,完成了6根方钢管混凝土和5根圆钢管混凝土共11个试件的反复推出试验。根据试验结果,探讨了钢管混凝土界面抗剪粘结力的组成、抗剪粘结破坏特点以及钢管混凝土界面抗剪粘结强度的主要影响因素。试验结果表明,方、圆钢管混凝土界面具有相似抗剪粘结滑移曲线;圆钢管混凝土界面抗剪粘结强度较方钢管混凝土的大,混凝土强度对圆钢管混凝土界面抗剪粘结强度的影响较小。Abstract: In order to study the behavior of shear bond at the interface of Concrete-Filled Steel Tubes(CFST),and the influence of section types on the behavior,11 repeated push-out tests were carried out,including 5 circular and 6 square CFST specimens.Based on tests results,the composing of shear bond force,failure mode and the factors of effect on the shear bond strength are analyzed.Tests results indicate that the shear bond force-slip curves of circular CFST specimens are similar to the square one.The shear bond strength of circular CFST is great than the square one,and is not considerably affected by the concrete strength.
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Key words:
- CFST /
- push-out test /
- shear bond strength /
- load-slip curve
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韩林海. 钢管混凝土结构. 北京: 科学出版社, 2000 钟善桐. 高层钢管混凝土结构. 哈尔滨: 黑龙江科学技术出版社,1999 蔡绍怀. 现代钢管混凝土结构. 北京: 人民交通出版社,2003 薛立红. 钢管混凝土柱组合界面抗剪连接的试验研究: [ 博士学位论文]. 北京: 中国建筑科学研究院, 1994 Virdi K S, Dowling P J. Bond Strength in Concrete Filled Circular SteelTubesPPCESLIC Report CC11. Engrg. Struct. Lab., Civ. Engry. Dept,Imperial College, London:1975
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